Eyewitnesses claim a silent killer sat beside an 18-year-old as he repeatedly stabbed him to death in a suburban London street.1calmYoung girls watched in horror as the knifeman chased the “humble and polite” teen as he ran for his life. The teenager then collapsed on the street in Hayes, west London, and the killer then sat beside him and continued to stab him in the back.

An eyewitness said: “I was screaming and shouting at the boy to stop what he was doing… He was running for his life. When I saw the blood on his back I picked up my phone. I picked up the phone and I saw the boy on the ground and the other one sitting there next to him stabbing him more. “I shouted, ‘Oi, stop it’ and called 999.

“He was sat on the floor. The other one had multiple stab wounds on him. The blade was slashing about like anything. He still carried on even though the white boy fell down. He was quiet. He was totally quiet. They were not saying anything… He walked off. He had the knife in his right hand and he just walked off… He was just so calm.”

The 18-year-old is the seventh teenager to be murdered in London this year. Despite efforts to resuscitate the man, he died at the scene. Police arrested an 18-year-old nearby on suspicion of murder.